AAT4282A
Dual Slew Rate Controlled Load Switch
™
SmartSwitch
General Description
Features
The AAT4282A SmartSwitch™ is a member of
AnalogicTech's Application Specific Power MOS-
FET™ (ASPM™) product family. The AAT4282A is
a dual P-channel MOSFET power switch designed
for high-side load-switching applications. Each
MOSFET has a typical RDS(ON) of 60mΩ, allowing
increased load switch current handling capacity with
a low forward voltage drop. The device is available
in three different versions with flexible turn-on and
turn-off characteristics – from very fast to slew-rate
limited. The standard 4282A (-1) version has a slew-
rate limited turn-on load switch. The AAT4282A (-2)
version features fast turn-on capability, typically less
than 500ns turn-on and 3µs turn-off times. The
AAT4282A (-3) variation offers a shutdown load dis-
charge circuit to rapidly turn off a load circuit when
the switch is disabled. An additional feature is a
slew-rate selector pin which can switch between fast
and slow slew rate.
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VIN Range: 1.5V to 6.5V
Low RDS(ON)
— 60mΩ Typical @ 5V
— 140mΩ Typical @ 1.5V
Slew Rate Turn-On Time Options
— 1ms
— 0.5µs
— 100µs
Fast Shutdown Load Discharge Option
Low Quiescent Current
— Typically 1µA
TTL/CMOS Input Logic Level
Temperature Range -40ºC to 85°C
FTDFN22-8 Package
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Applications
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Cellular Telephones
Digital Still Cameras
Hotswap Supplies
Notebook Computers
PDA Phones
PDAs
PMPs
Smartphones
All the AAT4282A load switch versions are
designed to operate from 1.5V up to 6.5V, making
them ideal for both 3V and 5V systems. Input logic
levels are TTL and 2.5V to 5V CMOS compatible.
The quiescent supply current is a very low 1µA.
The AAT4282A is available in the Pb-free, low pro-
file 2.0x2.0mm FTDFN22-8 package and is speci-
fied over the -40 to 85°C temperature range.
Typical Application
OUTA
INA
INA
OUTA
OUTB
INB
INB
OUTB
ON/OFF
AAT4282A
ENA
ENB
FAST
ON/OFF
C1
1μF
C2
1μF
C3
0.1μF
C4
0.1μF
FAST/SLOW
GND
N/C
4282A.2007.09.1.1
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